Craig Futterman, a University of Chicago law professor, said [Police Superintendent Garry] McCarthy's call for more contact carding puts officers at risk of making more illegal stops and threatens to undermine the department's efforts to improve trust, particularly with the African-American community.

"Police officers are getting lots of pressure. More and more stops. More and more searches. More and more frisks," said Futterman, who specializes in police misconduct issues. "And the people on the other end of that ... who live in the very communities that are most besieged by crime, most besieged by violence and who the police officers need as effective sources of information ... are alienating and pushing away from the police."